1. Flockhart B. D., Critical Reviews in Analytical Chemistry (Sievers E., ed.), 69 ff. New York: Academic Press. 1976.
2. Hofer O., Topics in Stereochemistry (Allinger N. L., Eliel E. L., eds.), Vol. 9, S. 111ff. New York: Interscience. 1976.
3. Inagaki F., Myazawa T., Progress in NMR Spectroscopy14, 67 (1981).
4. Hamilton W. C., Acta Cryst.18, 502 (1965).
5. Conolly J. D.,McCrindle R., Chem. & Ind.1965, 379.